By Tottenham correspondent Tony Hughes

Tottenham have made a move for Toby Alderweireld as they attempt to beat Southampton to the signing of the in-demand defender, Football Insider sources understand.

Southampton manager Ronald Koeman has admitted his team are pursuing the versatile defender, who spent last season on loan at St Mary’s from Atletico Madrid.

But Spurs are set for talks with Atletico in a bid to land the Belgium international after identifying him as summer target.

Southampton have a £6.8million option to buy Alderweireld, but Atletico can cancel that clause for £1.5million and then sell to the highest bidder.

The Spanish club want at least £10million for the 16-year-old, despite the fact that he has been deemed surplus to requirements by manager Diego Simeone.